/****************************************************************************
 * config/vsn/src/power.c
 * arch/arm/src/board/power.c
 *
 *   Copyright (C) 2011 Uros Platise. All rights reserved.
 *
 *   Authors: Uros Platise <uros.platise@isotel.eu>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 ****************************************************************************/

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>

#include <stdint.h>
#include <stdbool.h>
#include <debug.h>

#include <nuttx/board.h>

#include <arch/irq.h>
#include <arch/board/board.h>
#include <arch/stm32/irq.h>

#include "vsn.h"

/****************************************************************************
 * Private Functions
 ****************************************************************************/

void board_power_register(void);
void board_power_adjust(void);
void board_power_status(void);

/****************************************************************************
 * Public Functions
 ****************************************************************************/

void board_power_init(void)
{
  stm32_configgpio(GPIO_PVS);
  stm32_configgpio(GPIO_PST);
  stm32_configgpio(GPIO_XPWR);
  stm32_configgpio(GPIO_SCTC);
  stm32_configgpio(GPIO_PCLR);
}

/****************************************************************************
 * Name: board_power_off
 *
 * Description:
 *   Power off the board.
 *
 *   If this function returns, then it was not possible to power-off the
 *   board due to some other constraints.
 *
 * Input Parameters:
 *   status - Status information provided with the power off event.
 *
 * Returned Value:
 *   If this function returns, then it was not possible to power-off the
 *   board due to some constraints.  The return value int this case is a
 *   board-specific reason for the failure to shutdown.
 *
 ****************************************************************************/

#ifdef CONFIG_BOARDCTL_POWEROFF
int board_power_off(int status)
{
  /* Check if external supply is not present, otherwise return
   * notifying that it is not possible to power-off the board
   * REVISIT
   */

  /* stop background processes */

  (void)up_irq_save();

  /* switch to internal HSI and get the PD0 and PD1 as GPIO */

  sysclock_select_hsi();

  /* trigger shutdown with pull-up resistor (not push-pull!) and wait. */

  stm32_gpiowrite(GPIO_PCLR, true);
  for (;;);
}
#endif
